Workington is a constituency^{[n 1]} in Cumbria represented in the House of Commons of the UK Parliament since 2019 by Mark Jenkinson, a Conservative.^{[n 2]}

Further to the completion of the 2023 Periodic Review of Westminster constituencies, the seat will be abolished. The town of Workington itself will be combined with the majority of the (to be abolished) constituency of Copeland to form Whitehaven and Workington. The remainder (comprising the majority of the electorate) will form part of the new seat of Penrith and Solway.^[2]

The constituency covers much of the north-west of Cumbria, corresponding largely to the Allerdale borough, except for the areas around Wigton and Keswick. As well as Workington itself, the constituency contains the towns of Cockermouth, Maryport, Aspatria and Silloth.

1918–1950: The Municipal Borough of Workington, the Urban Districts of Arlecdon and Frizington, Aspatria, Harrington, and Maryport, and parts of the Rural Districts of Cockermouth, Whitehaven, and Wigton.

1950–1983: The Municipal Borough of Workington, the Urban Districts of Cockermouth, Keswick, and Maryport, and the Rural District of Cockermouth.

1983–1997: The District of Allerdale wards of All Saints, Binsey, Broughton, Castle, Clifton, Crummock, Dalton, Dearham, Derwent Valley, Ellen, Ellenborough, Ewanrigg, Flimby, Harrington, Keswick, Moorclose, Netherhall, Northside, St Bridget's, St John's, St Michael's, Salterbeck, Seaton Moor, Stainburn, and Westfield.

1997–2010: All the wards of the District of Allerdale except the Marsh, Wampool, Warnell and Wigton wards.

2010–present: The Borough of Allerdale wards of All Saints, Aspatria, Boltons, Broughton St Bridget's, Christchurch, Clifton, Ellen, Ellenborough, Ewanrigg, Flimby, Harrington, Holme, Marsh, Moorclose, Moss Bay, Netherhall, St John's, St Michael's, Seaton, Silloth, Solway, Stainburn, Wampool, Waver, and Wharrels.

The constituency was created by the Representation of the People Act 1918, which also abolished the seat of Cockermouth. Workington has traditionally supported the Labour Party, although a by-election in 1976 (forced by the elevation of Fred Peart to the House of Lords) was won by Richard Page of the Conservative Party. However, the constituency reverted to type at the 1979 general election when it was regained by Labour. Labour held the seat until the 2019 general election, when Mark Jenkinson won the seat for Conservatives for the first time in forty years.^[4]

• List of parliamentary constituencies in Cumbria